Fair Value of Financial Instruments Financial Instruments Carried at Fair Value(Details) (Fair Value, Inputs, Level 2 [Member], USD $)	Dec. 31, 2013	Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial assets carried at fair value	$ 53,043,000	$ 4,482,000
Financial liabilities carried at fair value	2,439,000	4,802,000
Derivatives not designated as hedges [Member] | Cross-currency swap agreement [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial liabilities carried at fair value	0	143,000
Cross-currency swap agreement [Member] | Prepaid expenses and other [Member] | Derivatives not designated as hedges [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial assets carried at fair value	16,056,000	255,000
Interest rate swap [Member] | Designated as hedging instrument [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial liabilities carried at fair value	2,439,000	4,659,000
Interest rate swap [Member] | Other assets [Member] | Designated as hedging instrument [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial assets carried at fair value	$ 36,987,000	$ 4,227,000